no such issue with both the internal keyboard & touchpad on my dad's old Toshiba Satellite 2013 laptop & running Win11 Pro 24H2 and the Toshiba laptop does use a Synaptics touchpad driver (specific to Toshiba only - driver version 19.4.3.195, which is the latest one I can use on the Toshiba) - they both work fine, even when not attaching an external usb mouse
I’ve seen similar behavior on a few machines after updating to 24H2. In some cases, the keyboard only works again after re-login or reconnecting the device.
Today I had it randomly on a 2013 Medion Laptop after a reboot (E6234): (including UEFI and SSE4.2, no TPM, so I had to use the bypass method.) OS: Windows 11 26H1 Pro Attaching external mouse and keyboard to log off and log on again, fixed it. (until you run into it again) CPU: Pentium B960 (SandyBridge) GFX: Intel HD 2000 Chipset: HM70 Panther Point 4GB DDR3 RAM Synaptics TouchPad PS/2 Had a American Megatrends Inc. BIOS 503 from 2012 (now updated to 506 from 2013.) Updating from within Windows 11 26H1 it rebooted with a fancy crisis update.